:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-2: #7c3aed;
  --danger: #ef4444;
  --radius: 10px;
  --shadow: 0 6px 18px rgba(15, 23, 42, 0.06);
  --max-width: 1100px;
}

* {
  box-sizing: border-box;
}

body {
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: var(--bg);
  color: #0f172a;
  margin: 0;
  padding: 24px;
  display: flex;
  justify-content: center;
  line-height: 1.5;
}

.container {
  width: 100%;
  max-width: var(--max-width);
}

h2 {
  margin: 0 0 18px 0;
  font-weight: 600;
  color: #0f172a;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 24px;
}

.card.small {
  padding: 12px;
}

.row {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

/* ---------- Buttons ---------- */
button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 10px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.2s ease, transform 0.1s ease, box-shadow 0.2s ease;
}

button:hover {
  background: #1d4ed8;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

button:active {
  transform: scale(0.97);
}

button.secondary {
  background: #e6eef9;
  color: var(--accent);
}

button.secondary:hover {
  background: #d3e2fd;
}

button.danger {
  background: var(--danger);
}

button.danger:hover {
  background: #dc2626;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ---------- Inputs & Selects ---------- */
input,
select,
textarea {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid #e6eef9;
  background: #fff;
  outline: none;
  font-family: inherit;
  font-size: 0.95rem;
  transition: border 0.2s, box-shadow 0.2s;
}

input:focus,
textarea:focus,
select:focus {
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.08);
  border-color: var(--accent);
}

label {
  font-weight: 500;
  margin-bottom: 4px;
  display: block;
  color: #334155;
}

/* ---------- Admin Login ---------- */
#loginArea {
  max-width: 420px;
  margin: 60px auto;
}

#loginArea .card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

#loginArea h2 {
  text-align: center;
}

/* ---------- Dashboard Stats ---------- */
#dashboard .row {
  margin-bottom: 24px;
}

.stat-card {
  flex: 1;
  min-width: 120px;
  background: linear-gradient(135deg, #ffffff 0%, #fafcff 100%);
  padding: 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
  transition: transform 0.2s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
}

.stat-card .stat-number {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}

.stat-card .stat-label {
  color: var(--muted);
  font-size: 0.9rem;
}

/* ---------- Table (photos) ---------- */
table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

th,
td {
  padding: 12px 16px;
  border-bottom: 1px solid #eef2f7;
  text-align: left;
  vertical-align: middle;
}

th {
  background: #f8fafc;
  font-weight: 600;
  color: #475569;
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: #f8fafc;
}

img.thumb {
  width: 100px;
  height: 75px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid #eef2f7;
  transition: transform 0.2s ease;
  cursor: pointer;
}

img.thumb:hover {
  transform: scale(2.5);
  z-index: 10;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* ---------- Gallery Grid (admin) ---------- */
#gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
}

.gallery-item {
  background: #fff;
  border-radius: 8px;
  padding: 8px;
  text-align: center;
  box-shadow: 0 6px 12px rgba(2, 6, 23, 0.04);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.gallery-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(2, 6, 23, 0.08);
}

.gallery-item img {
  width: 100%;
  height: 120px;
  object-fit: cover;
  border-radius: 6px;
}

.gallery-item small {
  display: block;
  color: var(--muted);
  margin-top: 6px;
  font-size: 0.8rem;
}

.gallery-item .actions {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 6px;
}

.gallery-item .actions button {
  padding: 4px 8px;
  font-size: 0.75rem;
}

/* ---------- User Interface (Webcam) ---------- */
.video-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

video#video {
  border-radius: 12px;
  box-shadow: 0 6px 24px rgba(2, 6, 23, 0.1);
  max-width: 100%;
  height: auto;
  background: #000;
  border: 1px solid #e2e8f0;
}

.controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.controls button {
  padding: 10px 18px;
  border-radius: 8px;
}

/* Status / recognition output */
#status {
  background: linear-gradient(180deg, #ffffff 0%, #fbfdff 100%);
  padding: 14px 20px;
  border-radius: 8px;
  box-shadow: 0 6px 12px rgba(2, 6, 23, 0.03);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 8px;
}

#user-name {
  font-weight: 700;
  font-size: 1.1rem;
  color: #0f172a;
}

#user-name.verified {
  color: #16a34a;
}

#user-name.unverified {
  color: var(--danger);
}

#confidence {
  color: var(--muted);
  font-size: 0.9rem;
}

.label {
  font-weight: 600;
  color: #0f172a;
}

.small-muted {
  color: var(--muted);
  font-size: 0.9rem;
}

/* Liveness indicator */
#liveness-status {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

#liveness-status.pass {
  background: #dcfce7;
  color: #16a34a;
}

#liveness-status.fail {
  background: #fee2e2;
  color: #b91c1c;
}

/* Canvas overlay for face detection boxes (client-side) */
canvas.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 12px;
}

.video-container {
  position: relative;
  display: inline-block;
}

/* ---------- Registration Page ---------- */
.registration-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.registration-steps .step {
  display: flex;
  align-items: center;
  gap: 12px;
}

.registration-steps .step .number {
  background: var(--accent);
  color: #fff;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

.capture-hint {
  background: #fff7ed;
  border: 1px solid #fed7aa;
  padding: 12px;
  border-radius: 8px;
  color: #9a3412;
  margin-top: 12px;
}

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .row {
    flex-direction: column;
  }
  .container {
    padding: 12px;
  }
  body {
    padding: 12px;
  }
  th,
  td {
    padding: 8px 10px;
  }
  img.thumb {
    width: 60px;
    height: 45px;
  }
  #gallery {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  }
  .controls button {
    padding: 8px 12px;
  }
}

/* ---------- Loading indicator ---------- */
.loader {
  width: 24px;
  height: 24px;
  border: 3px solid #e2e8f0;
  border-top: 3px solid var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
  vertical-align: middle;
  margin-right: 8px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Utility */
.text-center {
  text-align: center;
}
.mt-2 {
  margin-top: 12px;
}
.mb-2 {
  margin-bottom: 12px;
}
.flex {
  display: flex;
}
.gap-2 {
  gap: 8px;
}